Pop star Taylor Swift led the iHeartRadio Music Awards when the awards show returned for its 12th annual ceremony Monday in Los Angeles.
Her Eras tour was designated Tour of the Century during the show.
In a message recorded for fans, she said that she was "so proud" of her tour.
"And the only reason I was able to take on those challenges, among others, the ambition of the production, the length of the show, the amount of shows, all the different countries we played in, that's all because of the fans," she said. "You mad the songs for the last couple decades into what they became so that we could do a three and a half hour setlist."
Billie Eilish, meanwhile, was awarded Album of the Year for Hit Me Hard and Soft, and she performed "Wildflower" during the show.Benson Boone received the Song of the Year honor for "Beautiful Things."
Nelly, Lady Gaga and Mariah Carey also received special acknowledgment with the Landmark Award, Innovator Award and Icon Award, respectively.
"Innovation isn't about breaking rules. It's about writing your own and convincing the world they were their's all along," she added.
The awards show was hosted by Grammy Award winner LL Cool J.